I found this thread in main MSFS forum and posted for help in it: http://forums.avsim.net/dcboard.php?az=sho...id=198058&page=Can anyone help me. I just developed this problem recently and before I had been running FS9 with no problems. Now I keep getting these errors after about 3-4 hr flight when going into a third party scenery.

try removing the scenery and then put it back in a bit at a time untill the problem reapears and there's your prob. you do not need to physicaly remove the scenery just turn it off in the scenery.cfg file (do it with notepad it saves you restating the game all the time), you can even keep the game running if you asign a key to refresh the scenery (so long as you do not crash that is).